Three yanas leading from the origin

Three outer yanas leading from the origin (Tib. ཀུན་འབྱུང་འདྲེན་པའི་ཐེག་པ་གསུམ་, kunjung drenpé tekpa sum, Wyl.kun 'byung 'dren pa'i theg pa gsum) — the name given to the three causal vehicles of characteristics in the context of the nine yana categorization. They are:

Why are these three called ‘vehicles leading from the origin’? It is because they lead us along the path to the result of liberation from samsara by abandoning all the actions (karma) and destructive emotions (kleshas) which are the cause or ‘origin’ [of suffering].[1]